The massacre that killed more than two dozen people at a Texas church on Sunday isn’t likely to jump-start attempts on Capitol Hill to enact fresh legislation addressing gun violence or mental health, according to lawmakers in both parties.

Trump placed the blame for what he described as rampant murders and shootings squarely on Democratic politicians. “Don't forget, the Democrats have ruled the inner cities for 100 years,” he said. “This is their rule.”

The U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives could reconsider the lawfulness of “bump stock” devices like the ones used by the Las Vegas gunman only if Congress amends existing gun laws or passes new legislation banning the accessories that allow semi-automatic rifles to mimic machine guns.

As the death toll from the shooting in Las Vegas rapidly rose, White House officials urged President Donald Trump to show restraint in his response: No speculative tweets, please. No over-the-top bluster.

The NRA’s position Thursday reflected an about-face on a long-standing position of opposing most gun restrictions, a position founded on the philosophy of the “slippery slope” — that allowing such legislation would beget still more, until law-abiding gun owners were deprived of their Second Amendment right to bear arms.